swim bladdernoun [ C ]
uk/ˈswɪm ˌblæd.ər/us/ˈswɪm ˌblæd.ɚ/specializedan organ like a bag inside a fish that holds air so that it does not sink and stays in the correct position
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Other major organs
- bladder
- cardiothoracic
- endocrine
- gall bladder
- gut
- hepatocellular
- kidney
- liver
- nephron
- pancreatic
- sense organ
- splanchnic
- spleen
- splenic
- tum
- vesica
- viscera
- vital organs